【多选题】下列关于色氨酸操纵子弱化子的描述正确的是
D.
弱化子可以阻止RNA聚合酶的通过,从而终止转录
【判断题】D 的特性方程为 Qn+1=D,与 Qn 无关,所以它是没有记忆功能的触发器。 ( ) 答案:
【单选题】The committee is due to __________ its report by the end of this year.
【单选题】In November the European Parliament's culture and education committee is due to move forward on its proposed 'audiovisual media services' directive, before sending it to the full parliament in Decembe...
A.
the scarce spectrum and only small number of stations existed
B.
advancement of technology
C.
the preference of different audiences
D.
Europe's attempt to update the rules